The more Ethanol the higher OctaneHere in my city Kwik Trip is not offering 88 octane 15% ethanol for its mid grade.
If you had to choose between that and 87 octane 10% ethanol, which would you choose and why?
That is today's riddle for you.
My understanding is that the more ethanol the more octane you need, because ethanol burns more quickly especially when put under pressure by a turbo. And yet, ethanol gives less energy per gallon.The more Ethanol the higher Octane
"In terms of its octane rating, ethanol has a rating of 113. As mentioned above, fuels with a higher octane rating reduce engine knocking and perform better. Also, almost all gasoline in the US contains 10 percent ethanol. When you mix 10 percent 113 octane ethanol with 85 octane gasoline it increases the octane two points to the normal 87 octane most consumers use. So the higher the ethanol content, the higher the octane. The octane rating for E15 (15% ethanol) is 88 octane and E85 (85% ethanol) is 108 octane".
In Michigan, and both states which touch Michigan, it's actually illegal to label your pumps as alcohol free. Call it the product secrecy law, or untruth in labeling act...I would suggest using 87 Unleaded and if possible, try Ethanol Free gasoline for like 15-25 cents more per gallon.
I would suggest using 87 Unleaded and if possible, try Ethanol Free gasoline for like 15-25 cents more per gallon. It'll give you roughly between 3-7 more mpg over 87 Unleaded. It'll also give your engine more energy. I would suggest using known stations that offers ethanol free gasoline as some gas stations listed on the site below is also known to selling racing fuel.
They don't.Why do they love ethanol?
Cooling properties; burns cooler (less energy content); combats knock; enables timing advance.Why do they love ethanol?
Okay. That makes some sense to me.Cooling properties; burns cooler (less energy content); combats knock; enables timing advance.
I wonder why they would reduce the octane that naturally occurs in ethanol if that is one of the few things it has going for it...or does octane not naturally occur in ethanol? Or maybe they are mixing it with gasoline with even lower octane than 85...maybe it is around 70 for all we know and they use the cheaper octane from ethanol to compensate, thus saving money? Just curious.They don't.
They just like the higher octane Ethanol offers (~113 octane).
But in the regular crapanol they have at the pump, the octane levels are the same as regular 87 without crapanol.
What they actually end up doing is mixing poor quality gasoline with low octane levels, with ethanol with high octane levels.
While I don't have the numbers, it'd be similar to, or like mixing 85 octane fuel with 113 octane ethanol, resulting in 87 octane fuel.
Turbos like 113 octane fuel, because you can increase the boost on those types of fuel.
But the regular gasoline rated at 87 octane with 10% ethanol, is a lot worse than 87octane without ethanol.
The only difference between the two, is worse gas mileage.
Yes, we are talking the same place. Well...let me know how it goes. I think I'm going to stick with 89 octane 10% ethanol which I can still get at the Kwik trip on lombardi avenue, not the other two however. Although, I found it cheapest at Citco on Military north of Shawano...can't remember the intersection. I'm going to watch the price there...and buy from them from now on if they are consistently competitive. Kwik trip use to be :>(Hazzlitt77-
Can't help notice your in Green Bay with your signature. Are we talking about the Kwik-Trip 88 product that is E-15? This product in accordance with their website is top tier detergent rated. I normally run 89 E10 and have since the car has been new. With Kwik Trip now removing all mid grade gas and going to 87/E10, 88/E15, and the very pricey 91/E0 I'm thinking of considering going back to Kwik Trip and trying a tank of 88/E15.
It's warm out, and I drive enough where fuel separation is not a concern to me. Would I use this product with bitter winter temperatures, maybe not. Potentially better throttle response under load in these warmer temperatures, and possibly not a significant decrease in fuel economy. I want to see how much fuel economy takes a hit if any.
I do wish this was made with 87/E0 and blended up to E15, instead of making it with 85/EO and blending up to 88/E15.
There's a local ethanol co-op gas station that's even cheaper on the E15, but they make no claims as the detergent level of the gasoline.
I've pumped tens of thousands of gallons of kwik trip gas in other cars, back in the day when Mid-grade used to be a nickel cheaper than 87. That was a marketing no brainier for a car guy.